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Tube, wire, rod made of bronze CuSi3Mn1

Properties of CuSi3Mn1 alloy

Grade: tinless, pressure-treated bronze.

Industrial usage: manufacture of springs, details of chemical industry, shipbuilding.

Percentage composition of CuSi3Mn1 grade

Identification Content
Ni <0,2
Pb <0,03
Sn <0,25
Zn <0,5
Si 2.7 — 3.5
Fe <0,3
Mn 1 — 1.5
Cu 94 — 96.3

Main properties

Tinless bronzes do not contain scarce tin in composition. They can be substitutes for tin bronzes because their mechanical, anticorrosion, technological properties are often superior to tin bronze. Tinless bronzes can be manganese, beryllium, aluminium, depending on the main alloying component. Tinless bronzes can be pressure-treated. They are manufactured in accordance with GOST 18 175−78. This standard is applied to tinless pressure-treated bronzes which intended for a manufacture of bars, semi-fabricates.

Coefficient of friction with lubricant = 0.013

Coefficient of friction without lubricant =0.4

Alloy hardness: HB 10 -1 = 70 — 90 MPа

Mechanical characteristics of CuSi3Mn1 at 20 °C

Mill-products δ5 (%) Size

KCU kJ/m2

ψ sT (MPa) σv (MPa)
Soft alloy 50−60         350−400
Hard alloy 6−8         650−750

Physical characteristics of CuSi3Mn1 grade

l (V/(m/Degree))

R 10 9(Ohm-m)

C (J/(kg/degree))

a 10 -6 (1/Degree)

E 10 -5 (MPa)

T (Degree)

r (kg/m3)

46 250     1,15 20 8400
    377 18   100  
Description Identification: Description Identification:
— differential deposit at a process of the first crack appearing, % å — ultimate tensile strength (rupture strength), MPa σv
— maximum shear stress, ultimate torsional strength, MPa — elastic strength, MPa σ0,05
— ultimate bending strength, MPa σ bend — conventional yield limit, MPa σ0,2
— fatigue endurance limit during bending test with symmetrical load cycle, MPa σ-1 — percentage elongation after rupture, % δ5,δ4,δ10
— fatigue endurance limit during torsion test with symmetrical load cycle, MPa J-1 — yield point (contraction), MPa σc 0,05
— amount of load cycling n — relative shear, % v
— specific electrical resistance, Ohmm R and ρ — short ultimate tensile strength, MPa sv
— standard module of elasticity HPa E — contraction ratio, % ψ
— properties getting temperature, Degree T — impact hardness, which is established on specimens with concentrators in accordance with V and U types, J/cm2 KCU and KCV
— heating capacity of alloy (heat conduction coefficient), V/(m°С) l — permanent change of form — yield point (proportionality), MPa sT
— specific heat of alloy (temperature range is 20°С), [J/(kgdeg)] C — Brinell hardness HB
— density, kg/m3 pn and r — Vicker’s hardness HV
— lineal thermal expansion coefficient (in a temperature range of 20°С), 1/°С a — Rockwell hardness C HRC
— long-time strength limit, MPa σtТ — Rockwell hardness B HRB
— module of elasticity at a process of torsional shear, HPa G — Shore hardness HSD

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